Translation of drawings from Spanish to English

I am looking for a translator to convert my technical drawings from Spanish to English while maintaining their original format. These drawings are extremely important and include vital step-by-step instructions as well as detailed information about various components. The drawings are in Spanish and must remain in their original format after translation. Accuracy is paramount, so the translator must have an advanced knowledge of Spanish and be familiar with technical terminology. Experience translating related technical materials is preferred and any samples provided will be appreciated.